Add Development Container Configuration and GitHub Codespace Support

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json.
+{
+    "name": "Joomla! Development",
+    "dockerComposeFile": "docker-compose.yml",
+    "service": "app",
+    "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    "features": {
+        "ghcr.io/devcontainers/features/common-utils:2": {
+            "username": "joomla"
+        },
+        "ghcr.io/devcontainers/features/node:1": {
+            "version": "20"
+        },
+        "ghcr.io/devcontainers/features/docker-in-docker:2": {},
+        "ghcr.io/devcontainers/features/git:1": {}
+    },
+    "onCreateCommand": "sudo chmod +x .devcontainer/install-tools.sh && .devcontainer/install-tools.sh",
+    "postCreateCommand": "sudo chmod +x .devcontainer/setup.sh && .devcontainer/setup.sh",
+    "forwardPorts": [
+        8080
+    ],
+    "remoteUser": "joomla"
+}

.devcontainer/docker-compose.yml

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+services:
+  app:
+    image: joomla:4.4.8-apache
+    restart: always
+    ports:
+      - 8080:80
+    environment:
+      JOOMLA_DB_HOST: db
+      JOOMLA_DB_USER: joomla
+      JOOMLA_DB_PASSWORD: examplepass
+      JOOMLA_DB_NAME: joomla_db
+      JOOMLA_SITE_NAME: Joomla
+      JOOMLA_ADMIN_USER: Joomla Hero
+      JOOMLA_ADMIN_USERNAME: joomla
+      JOOMLA_ADMIN_PASSWORD: joomla@secured
+      JOOMLA_ADMIN_EMAIL: joomla@example.com
+    volumes:
+      - ../..:/workspaces:cached
+
+  db:
+    image: mysql
+    restart: unless-stopped
+    environment:
+      MYSQL_DATABASE: joomla_db
+      MYSQL_USER: joomla
+      MYSQL_PASSWORD: examplepass
+      MYSQL_RANDOM_ROOT_PASSWORD: "1"
+    volumes:
+      - db:/var/lib/mysql
+
+volumes:
+  db:

.devcontainer/install-tools.sh

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+#!/bin/sh
+
+set -eux
+
+echo "Installing chromium..."
+sudo apt-get update
+sudo apt-get -y install --no-install-recommends chromium
+
+# Copy the welcome message
+sudo cp .devcontainer/welcome-message.txt /usr/local/etc/vscode-dev-containers/first-run-notice.txt

.devcontainer/setup.sh

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+#!/bin/sh
+
+set -eux
+
+if [ -z ${CODESPACE_NAME+x} ]; then
+	SITE_HOST="http://localhost:8080"
+else
+	SITE_HOST="https://${CODESPACE_NAME}-8080.${GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN}"
+fi
+
+# Install dependencies

.devcontainer/welcome-message.txt

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+👋 Welcome to "Joomla! Development" in Codespaces!
+
+🛠️  Your environment is fully setup with all the required software.
+
+🚀 To get started, wait for the "postCreateCommand" to finish setting things up, then open the portforwarded URL and append '/administrator'.